Ningde Amperex Technology Limited

Wei Cui

Xinghua Tao

Cong Cheng

Chaowang Lin

Yisong Su

Changchuan Shi

A separator includes: a first porous substrate; and a second porous substrate arranged on at least one surface of the first porous substrate; wherein the elongation at break of the second porous substrate is greater than the elongation at break of the first porous substrate in at least one of the machine and transverse directions of the separator. The separator has a high tensile strength and an elongation at break and good heat resistance, and may improve the safety performance of the energy storage device when the separator is applied to the energy storage device.

Separator and energy storage device

The present application provides a separator and an energy storage device. The separator comprises: a first porous substrate; and a second porous substrate arranged on at least one surface of the first porous substrate; wherein the elongation at break of the second porous substrate is greater than the elongation at break of the first porous substrate in at least one of the machine and transverse directions of the separator. The separator has a high tensile strength and an elongation at break and good heat resistance, and may improve the safety performance of the energy storage device when the separator is applied to the energy storage device.

The present application provides an electrode and an electrochemical device comprising the electrode. The electrode comprises a current collector; and an inorganic layer arranged on a surface of the current collector, wherein the inorganic layer comprises a metal oxide and does not comprise a polymer. The electrode of the lithium ion battery provided by the present application has little influence on the volume energy density of the lithium ion battery while improving the safety performance of the lithium ion battery.

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Fujian, China

Wei Cui